(19)
(11) EP 1 303 641 A2

(12)

(88) Date of publication A3:
06.09.2002

(43) Date of publication:
23.04.2003 Bulletin 2003/17

(21) Application number: 01954948.4

(22) Date of filing: 25.07.2001
(51) International Patent Classification (IPC)7C22B 15/00, C22B 3/08, C22B 1/00
(86) International application number:
PCT/US0123/366
(87) International publication number:
WO 0200/8475 (31.01.2002 Gazette 2002/05)
(84) Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
Designated Extension States:
AL LT LV MK RO SI

(30) Priority: 25.07.2000 US 220673 P

(71) Applicant: Phelps Dodge Corporation
Phoenix, AZ 85004-3014 (US)

(72) Inventors:
  • MARDSEN, John, O
    Phoenix, AZ 85022 (US)
  • BREWER, Robert, E.
    Safford, AZ 85546 (US)
  • ROBERTSON, Joanna, M.
    Thatcher, AZ 85552 (US)
  • HAZEN, Wayne, W.
    Lakewood, CO 80215 (US)
  • THOMPSON, Philip
    West Valley City, UT 84120 (US)
  • BAUGHMAN, David, R.
    Golden, CO 80401 (US)
  • SCHMIDT, Roland
    Golden, CO 80403 (US)

(74) Representative: Hanna, Peter William Derek 
Peter Hanna Associates11 Mespil Road
Dublin 4
Dublin 4 (IE)

   


(54) METHOD FOR RECOVERY OF COPPER FROM SULFIDIC ORE MATERIALS USING SUPER-FINE GRINDING AND MEDIUM TEMPERATURE PRESSURE LEACHING